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WO2003091598A1 - Courroie a faible module - Google Patents

Courroie a faible module Download PDF

Info

Publication number
WO2003091598A1
WO2003091598A1 PCT/US2003/008439 US0308439W WO03091598A1 WO 2003091598 A1 WO2003091598 A1 WO 2003091598A1 US 0308439 W US0308439 W US 0308439W WO 03091598 A1 WO03091598 A1 WO 03091598A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
fibers
approximately
range
tensile
Prior art date
Application number
PCT/US2003/008439
Other languages
English (en)
Inventor
Susan Welk
Paul S. Knutson
Original Assignee
The Gates Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Gates Corporation filed Critical The Gates Corporation
Priority to BR0304556-0A priority Critical patent/BR0304556A/pt
Priority to AU2003222019A priority patent/AU2003222019A1/en
Publication of WO2003091598A1 publication Critical patent/WO2003091598A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/20—V-belts, i.e. belts of tapered cross-section with a contact surface of special shape, e.g. toothed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/06—Driving-belts made of rubber
    • F16G1/08—Driving-belts made of rubber with reinforcement bonded by the rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/04—V-belts, i.e. belts of tapered cross-section made of rubber
    • F16G5/06—V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber

Definitions

  • the invention relates to a power transmission belt and more particularly to a low modulus power transmission belt.
  • a belt is generally installed between a driver and driven pulley, such as in the case of an accessory belt drive on a vehicle engine.
  • the belt comprises a tensile cord embedded in an elastomeric material.
  • the tensile cord, or cords are oriented parallel to a longitudinal axis in order to maximize a load carrying capability.
  • the tensile cord is wound on a belt build in a continuous manner during fabrication. Power transmission belts must possess sufficient tensile strength to allow a required torque, and load, to be transmitted between pulleys.
  • a belt having a high tensile strength also will generally have a commensurately high modulus .
  • a belt having a high modulus will be relatively stiff. Further, installation of a prior art high modulus belt requires moveable axis pulleys.
  • a low modulus belt may be used in situations where the torque to be transmitted is less than that required for a high load application.
  • Low modulus belts are fabricated using tensile cords with a predetermined preload, or little or no preload. They may be fabricated using tensile cords having a twist as well. The material selected for the tensile cord will have the greatest effect on the modulus of the belt. Polya ide 4.6 is known for such use.
  • EP 0 625 650 to Gates that discloses a low modulus belt having a tensile cord wound with a preload in a longitudinal direction.
  • the prior art teaches use of a tensile cord comprising polyamide 4.6 twisted strands. Use of a single material for the tensile cord limits the modulus range for a belt. What is needed is a low modulus belt having a hybrid tensile cord comprising at least two different materials. What is needed is a low modulus belt having a tensile cord comprising a polyamide 4.6 core having an outer sheath of polyester staple fibers. What is needed is a low modulus belt having a modulus in the range of approximately 1200 N/mm to 4500 N/mm. The present invention meets these needs .
  • the primary aspect of the invention is to provide a low modulus belt having a hybrid tensile cord comprising at least two different materials.
  • Another aspect of the invention is to provide a low modulus belt having a tensile cord comprising a polyamide 4.6 core having an outer sheath of polyester staple fibers on an outer surface.
  • Another aspect of the invention is to provide a low modulus belt having a modulus in the range of approximately 1200 N/mm to 4500 N/mm.
  • the invention comprises a low modulus belt having an elastomeric body and tensile cord embedded therein.
  • the tensile cord comprises a polyamide 4.6 core having an outer layer of polyester staple fibers.
  • the modulus of the belt is in the range of approximately 1200 N/mm to 4000 N/mm.
  • Fig. 1 is a side view of a tensile member having a single strand core.
  • Fig. la is a cross-sectional view at line la-la in Fig. 1.
  • Fig. 2 is a cross-sectional view of an inventive belt.
  • Fig. 3 is a side view of a tensile member having a twisted strand core.
  • Fig. 3a is a cross-sectional view at line 3a-3a in Fig. 3.
  • Fig. 1 is a side view of a tensile member having a single strand core.
  • Tensile member 100 is a hybrid composition which comprises a core 10 covered by staple fibers 20.
  • Core 10 comprises polyamide 4.6 in the preferred embodiment. Core 10 may also comprise polyamide 6, polyamide 6,6 and polyamide 12, and all equivalents. Core
  • 10 may comprise either a single strand or may comprise a twisted yarn comprising two or more strands.
  • Staple fibers 20 substantially comprise polyester.
  • the polyester fibers have a length in the range of approximately 10-40mm.
  • the polyester fibers have a thickness in the range of approximately 10-30 ⁇ m.
  • Prior art belts having tensile members comprising a strand of polyamide 4.6 have very low odulii, for example, in the range of 40 N/mm to 800 N/mm. While this is suitable for use in appliances such as washing machines, it is too low for automotive applications.
  • the polyester sheath has the desirable effect of increasing the modulus of the belt over a comparable belt without a polyester sheath, while retaining the desirable modulus and elasticity of polyamide 4.6.
  • Staple fibers 20 are applied to core 10 using a friction spinning process known in the art.
  • a friction spinning process known in the art.
  • the friction spinning process as described by the University of Aachen, Department of Textile Technology.
  • a suitable cord is also manufactured by Fehrer AG (Lin is the z-Austria) using the DREFTM process.
  • Fig. la is a cross-sectional view at line la-la in
  • FIG. 1 Fibers 20 are shown spun into a covering or sheath around the outside of core strand 10.
  • Fig. 2 is a cross-sectional view of an inventive belt.
  • Belt 1000 comprises tensile members 100, which are shown embedded in elastomeric body 200.
  • Tensile members 100 extend in a longitudinal direction along an endless length of the belt.
  • Ribs 300 project from one side of the belt and extend longitudinally along an endless length of the belt as well.
  • Elastomeric body 200 may comprise natural or synthetic rubbers, polychloroprene, alkylated chlorosulphonated material, hydrogenated nitrile butadiene rubber (HNBR) , or EPDM, as well as equivalents of any of the foregoing.
  • HNBR hydrogenated nitrile butadiene rubber
  • the inventive belt has an elastic modulus relative to the belt width and measured in the lengthwise direction in the range of 1200 N/mm to 4500 N/mm per belt strand. Said measurement comprises a stress-strain curve average slope from a stress range of 150 to 300 N/rib/strand on the third of three belt elongation cycles. This results in an elongation in the range of approximately 0.5% to 10%.
  • the belt test apparatus includes a tensile test machine, such as an Instron® or equivalent known in the art.
  • a tensile test machine such as an Instron® or equivalent known in the art.
  • a belt is placed in an inverted position on a set of test pulleys in the tensile test machine. Inverted meaning the ribbed portion is not engaged with the test pulleys.
  • the test pulleys are not rotated during the test.
  • the belt is subjected to three load cycles on the test machine in order to stabilize the belt.
  • the belt modulus is determined from the third of three load cycles on the test machine.
  • Fig. 3 is a side view of a tensile member having a twisted strand core.
  • Tensile member 101 comprises strands 11 and 12 which are twisted to form a core.
  • Strands 11 and 12 may have either an "S" or "Z" twist.
  • Fibers 20 are spun over strands 11, 12 using the method as described for Fig. 1.
  • Core 102 may comprise two or more strands twisted together.
  • Fig. 3a is a cross-sectional view at line 3a-3a in Fig. 3. Fibers 20 are shown spun around the outside of twisted core strands 11, 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Belt Conveyors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une courroie (1000) à corps élastomère (200) et nappe corde de traction (100) intégrée, laquelle comprend un coeur en polyamide 4,6 (10) avec un manchon externe en fibres courtes de polyester (20). Le module de la courroie est compris entre environ 1200 N/mm et 4500 N/mm.
PCT/US2003/008439 2002-04-25 2003-03-17 Courroie a faible module WO2003091598A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR0304556-0A BR0304556A (pt) 2002-04-25 2003-03-17 Correia com módulo baixo
AU2003222019A AU2003222019A1 (en) 2002-04-25 2003-03-17 Low modulus belt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/133,993 2002-04-25
US10/133,993 US20030203781A1 (en) 2002-04-25 2002-04-25 Low modulus belt

Publications (1)

Publication Number Publication Date
WO2003091598A1 true WO2003091598A1 (fr) 2003-11-06

Family

ID=29249122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/008439 WO2003091598A1 (fr) 2002-04-25 2003-03-17 Courroie a faible module

Country Status (5)

Country Link
US (1) US20030203781A1 (fr)
AU (1) AU2003222019A1 (fr)
BR (1) BR0304556A (fr)
TW (1) TWI222500B (fr)
WO (1) WO2003091598A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI435970B (zh) * 2006-09-29 2014-05-01 Inventio Ag 具有張力載體之扁平帶狀支撐驅動構件
JP2009127691A (ja) * 2007-11-21 2009-06-11 Bando Chem Ind Ltd Ｖリブドベルト
US10012291B2 (en) * 2016-07-21 2018-07-03 Contitech Antriebssysteme Gmbh Low modulus belt utilizing tensile member and belt carcass
JP6748152B2 (ja) * 2017-07-04 2020-08-26 三ツ星ベルト株式会社 Ｖリブドベルト
US12123475B2 (en) * 2020-01-16 2024-10-22 Mitsuboshi Belting Ltd. Core wire for drive belt, drive belt, and method for manufacturing core wire and drive belt
FR3118654A1 (fr) * 2021-01-07 2022-07-08 Compagnie Generale Des Etablissements Michelin Courroie de transmission de puissance présentant un comportement bimodule en fonctionnement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855870A (en) * 1973-07-02 1974-12-24 Gates Rubber Co Power transmission belt, reinforcement and process
EP0625650A1 (fr) 1993-05-20 1994-11-23 The Gates Rubber Company Courroie en V ou courroie à nervures en V
US6033331A (en) 1996-09-20 2000-03-07 Hutchinson Power transmission belt for automotive applications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855870A (en) * 1973-07-02 1974-12-24 Gates Rubber Co Power transmission belt, reinforcement and process
EP0625650A1 (fr) 1993-05-20 1994-11-23 The Gates Rubber Company Courroie en V ou courroie à nervures en V
US6033331A (en) 1996-09-20 2000-03-07 Hutchinson Power transmission belt for automotive applications

Also Published As

Publication number Publication date
TW200307094A (en) 2003-12-01
US20030203781A1 (en) 2003-10-30
AU2003222019A1 (en) 2003-11-10
TWI222500B (en) 2004-10-21
BR0304556A (pt) 2004-08-03

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